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Cheap flights from St. Louis to Sofia from $762

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
1:08 pm - 10:45 pm
STL
-
SOF
25h 37m
2 stops
Lufthansa Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$762Lufthansa
Mon, Nov 2 - Fri, Nov 13
Lufthansa Logo
7:04 pm - 10:45 pm
STL
-
SOF
19h 41m
2 stops
Lufthansa Logo
2:05 pm - 11:09 pm
SOF
-
STL
17h 04m
2 stops
$766Lufthansa
Mon, Nov 2 - Fri, Nov 13
United Airlines Logo
8:40 am - 1:10 pm
STL
-
SOF
20h 30m
2 stops
United Airlines Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$768United Airlines
Sun, Nov 1 - Wed, Nov 11
United Airlines Logo
3:40 pm - 6:10 pm
STL
-
SOF
18h 30m
1 stop
United Airlines Logo
6:25 am - 1:45 pm
SOF
-
STL
15h 20m
1 stop
$775United Airlines
Wed, Nov 4 - Wed, Nov 11
United Airlines Logo
8:40 am - 1:15 pm
STL
-
SOF
20h 35m
2 stops
United Airlines Logo
2:05 pm - 3:26 pm
SOF
-
STL
33h 21m
2 stops
$777United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
1:24 pm - 1:10 pm
STL
-
SOF
15h 46m
2 stops
United Airlines Logo
6:25 am - 7:40 pm
SOF
-
STL
21h 15m
2 stops
$778United Airlines
Sun, Nov 1 - Thu, Nov 12
United Airlines Logo
3:30 pm - 6:10 pm
STL
-
SOF
18h 40m
1 stop
United Airlines Logo
6:00 am - 3:26 pm
SOF
-
STL
41h 26m
2 stops
$785United Airlines
Sun, Oct 18 - Tue, Nov 3
Lufthansa Logo
7:01 pm - 12:10 pm
STL
-
SOF
33h 09m
2 stops
Lufthansa Logo
6:25 am - 9:13 pm
SOF
-
STL
22h 48m
2 stops
$789Lufthansa
Sat, Oct 17 - Tue, Nov 3
Air Canada Logo
4:05 pm - 1:25 pm
STL
-
SOF
38h 20m
2 stops
Air Canada Logo
2:05 pm - 3:26 pm
SOF
-
STL
33h 21m
2 stops
$791Air Canada
Sat, Oct 31 - Tue, Nov 17
Lufthansa Logo
7:04 pm - 10:45 pm
STL
-
SOF
19h 41m
2 stops
Lufthansa Logo
2:05 pm - 1:45 pm
SOF
-
STL
31h 40m
1 stop
$793Lufthansa
Sun, Nov 1 - Thu, Nov 12

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United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets
United Airlines
Nov 1
STL8:40 amLambert-St Louis
20h 30m
2 stops
SOF1:10 pmSofia
Nov 11
SOF6:25 amSofia
15h 20m
1 stop
STL1:45 pmLambert-St Louis
$768
United Airlines
Nov 4
STL3:40 pmLambert-St Louis
18h 30m
1 stop
SOF6:10 pmSofia
Nov 13
SOF6:25 amSofia
15h 20m
1 stop
STL1:45 pmLambert-St Louis
$775
United Airlines
Nov 10
STL8:40 amLambert-St Louis
20h 35m
2 stops
SOF1:15 pmSofia
Nov 12
SOF2:05 pmSofia
33h 21m
2 stops
STL3:26 pmLambert-St Louis
$777

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets
Lufthansa
Nov 2
STL1:08 pmLambert-St Louis
25h 37m
2 stops
SOF10:45 pmSofia
Nov 13
SOF6:25 amSofia
15h 20m
1 stop
STL1:45 pmLambert-St Louis
$762
Lufthansa
Nov 2
STL7:04 pmLambert-St Louis
19h 41m
2 stops
SOF10:45 pmSofia
Nov 13
SOF2:05 pmSofia
17h 04m
2 stops
STL11:09 pmLambert-St Louis
$766
Lufthansa
Oct 17
STL7:01 pmLambert-St Louis
33h 09m
2 stops
SOF12:10 pmSofia
Nov 3
SOF6:25 amSofia
22h 48m
2 stops
STL9:13 pmLambert-St Louis
$789

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 12, 2026.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Mon 11/2

1:08 pm-10:45 pm

2 stops25h 37m

Sofia

Fri 11/13

6:25 am-1:45 pm

1 stop15h 20m

$762

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Mon 11/2

7:04 pm-10:45 pm

2 stops19h 41m

Sofia

Fri 11/13

2:05 pm-11:09 pm

2 stops17h 04m

$766

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 11/1

8:40 am-1:10 pm

2 stops20h 30m

Sofia

Wed 11/11

6:25 am-1:45 pm

1 stop15h 20m

$768
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Wed 11/4

3:40 pm-6:10 pm

1 stop18h 30m

Sofia

Wed 11/11

6:25 am-1:45 pm

1 stop15h 20m

$775

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 11/10

8:40 am-1:15 pm

2 stops20h 35m

Sofia

Thu 11/12

2:05 pm-3:26 pm

2 stops33h 21m

$777

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 11/1

1:24 pm-1:10 pm

2 stops15h 46m

Sofia

Thu 11/12

6:25 am-7:40 pm

2 stops21h 15m

$778

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 10/18

3:30 pm-6:10 pm

1 stop18h 40m

Sofia

Tue 11/3

6:00 am-3:26 pm

2 stops41h 26m

$785

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 10/17

7:01 pm-12:10 pm

2 stops33h 09m

Sofia

Tue 11/3

6:25 am-9:13 pm

2 stops22h 48m

$789

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 10/31

4:05 pm-1:25 pm

2 stops38h 20m

Sofia

Tue 11/17

2:05 pm-3:26 pm

2 stops33h 21m

$791

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 11/1

7:04 pm-10:45 pm

2 stops19h 41m

Sofia

Thu 11/12

2:05 pm-1:45 pm

1 stop31h 40m

$793

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Sofia from

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from St. Louis is in October. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from St. Louis during January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $528.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time

15h 10m

Direct flights

None
The fastest flight from St. Louis to Sofia takes 15h 10m
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

Frequently asked questions about flying from St. Louis to Sofia

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 15h 10m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $559Free CancellationRating
7.4
9,981 reviews
Search United Airlines flights
LufthansaPriceFrom $567Free CancellationRating
6.8
8,128 reviews
Search Lufthansa flights
Air CanadaPriceFrom $1,108Free CancellationRating
7.1
11,328 reviews
Search Air Canada flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sofia?

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Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
United Airlines
Air Canada